本文整理汇总了Java中java.nio.channels.FileChannel.transferFrom方法的典型用法代码示例。如果您正苦于以下问题：Java FileChannel.transferFrom方法的具体用法？Java FileChannel.transferFrom怎么用？Java FileChannel.transferFrom使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.nio.channels.FileChannel的用法示例。
在下文中一共展示了FileChannel.transferFrom方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: copyFile
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
public static void copyFile(File sourceFile, File destFile) throws IOException {
if (!destFile.getParentFile().exists())
destFile.getParentFile().mkdirs();
if (!destFile.exists()) {
destFile.createNewFile();
}
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
destination.transferFrom(source, 0, source.size());
} finally {
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
}
示例2: restore_history
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
private void restore_history () {
try {
File sd = Environment.getExternalStorageDirectory();
File data = Environment.getDataDirectory();
if (sd.canWrite()) {
String currentDBPath = "//data//" + "jae.KidsPortal.Browser"
+ "//databases//" + "history_DB_v01.db";
String backupDBPath = "//Android//" + "//data//" + "//browser.backup//" + "history_DB_v01.db";
File currentDB = new File(data, currentDBPath);
File backupDB = new File(sd, backupDBPath);
FileChannel src = new FileInputStream(backupDB).getChannel();
FileChannel dst = new FileOutputStream(currentDB).getChannel();
dst.transferFrom(src, 0, src.size());
src.close();
dst.close();
Snackbar.make(frameLayout, getString(R.string.toast_restore), Snackbar.LENGTH_LONG).show();
}
} catch (Exception e) {
Snackbar.make(frameLayout, getString(R.string.toast_restore_not), Snackbar.LENGTH_LONG).show();
}
}
示例3: backup_ReadLater
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
private void backup_ReadLater () {
try {
File sd = Environment.getExternalStorageDirectory();
File data = Environment.getDataDirectory();
if (sd.canWrite()) {
String currentDBPath3 = "//data//" + "jae.KidsPortal.Browser"
+ "//databases//" + "readLater_DB_v01.db";
String backupDBPath3 = "//Android//" + "//data//" + "//browser.backup//" + "readLater_DB_v01.db";
File currentDB3 = new File(data, currentDBPath3);
File backupDB3 = new File(sd, backupDBPath3);
FileChannel src3 = new FileInputStream(currentDB3).getChannel();
FileChannel dst3 = new FileOutputStream(backupDB3).getChannel();
dst3.transferFrom(src3, 0, src3.size());
src3.close();
dst3.close();
Snackbar.make(frameLayout, getString(R.string.toast_backup), Snackbar.LENGTH_LONG).show();
}
} catch (Exception e) {
Snackbar.make(frameLayout, getString(R.string.toast_backup_not), Snackbar.LENGTH_LONG).show();
}
}
示例4: copyFile
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
public static void copyFile(File sourceFile, File destFile) throws IOException {
if (!destFile.exists()) {
destFile.createNewFile();
}
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
// previous code: destination.transferFrom(source, 0, source.size());
// should be to avoid infinite loops.
long count =0;
long size = source.size();
while ((count += destination.transferFrom(source, 0, size-count))<size);
} finally {
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
}
示例5: backup_history
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
private void backup_history () {
try {
File sd = Environment.getExternalStorageDirectory();
File data = Environment.getDataDirectory();
if (sd.canWrite()) {
String currentDBPath = "//data//" + "jae.KidsPortal.Browser"
+ "//databases//" + "history_DB_v01.db";
String backupDBPath = "//Android//" + "//data//" + "//browser.backup//" + "history_DB_v01.db";
File currentDB = new File(data, currentDBPath);
File backupDB = new File(sd, backupDBPath);
FileChannel src = new FileInputStream(currentDB).getChannel();
FileChannel dst = new FileOutputStream(backupDB).getChannel();
dst.transferFrom(src, 0, src.size());
src.close();
dst.close();
Snackbar.make(frameLayout, getString(R.string.toast_backup), Snackbar.LENGTH_LONG).show();
}
} catch (Exception e) {
Snackbar.make(frameLayout, getString(R.string.toast_backup_not), Snackbar.LENGTH_LONG).show();
}
}
示例6: copyFile
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
static void copyFile(File sourceFile, File destFile) throws IOException {
if (!destFile.getParentFile().exists())
destFile.getParentFile().mkdirs();
if (!destFile.exists()) {
destFile.createNewFile();
}
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
destination.transferFrom(source, 0, source.size());
} finally {
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
}
示例7: update
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
public boolean update(){
try{
DebugLogger.log("Updating...", Level.INFO);
String path = Main.class.getProtectionDomain().getCodeSource().getLocation().toURI().getPath();
ReadableByteChannel in = Channels.newChannel(new URL(updateURL + "gfx.jar").openStream());
FileChannel out = new FileOutputStream(path).getChannel();
out.transferFrom(in, 0, Long.MAX_VALUE);
in.close();
out.close();
DebugLogger.log("Update successful!", Level.INFO);
return true;
}catch(Exception e){
DebugLogger.log("Update failed!", Level.INFO);
return false;
}
}
示例8: copyResource
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
public void copyResource(OpenForReadResult input, OutputStream outputStream) throws IOException {
assertBackgroundThread();
try {
InputStream inputStream = input.inputStream;
if (inputStream instanceof FileInputStream && outputStream instanceof FileOutputStream) {
FileChannel inChannel = ((FileInputStream)input.inputStream).getChannel();
FileChannel outChannel = ((FileOutputStream)outputStream).getChannel();
long offset = 0;
long length = input.length;
if (input.assetFd != null) {
offset = input.assetFd.getStartOffset();
}
// transferFrom()'s 2nd arg is a relative position. Need to set the absolute
// position first.
inChannel.position(offset);
outChannel.transferFrom(inChannel, 0, length);
} else {
final int BUFFER_SIZE = 8192;
byte[] buffer = new byte[BUFFER_SIZE];
for (;;) {
int bytesRead = inputStream.read(buffer, 0, BUFFER_SIZE);
if (bytesRead <= 0) {
break;
}
outputStream.write(buffer, 0, bytesRead);
}
}
} finally {
input.inputStream.close();
if (outputStream != null) {
outputStream.close();
}
}
}
示例9: addLibrary
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
public void addLibrary(String name) throws Exception {
OpenArch.log.info(String.format("Loading %s.", name));
String libPath = String.format("/assets/%s/lib/%s", OpenArch.MODID, name);
URL libUrl = getClass().getResource(libPath);
ReadableByteChannel in = Channels.newChannel(libUrl.openStream());
String tmpLibPath = String.format("%s/%s", tmpDir, name);
File tmpLibFile = new File(tmpLibPath);
if (tmpLibFile.exists()) {
return;
}
FileChannel out = new FileOutputStream(tmpLibFile).getChannel();
out.transferFrom(in, 0, Long.MAX_VALUE);
tmpLibFile.deleteOnExit();
if (!tmpLibFile.setReadable(true, false)) {
throw new Exception("Failed to set readable flag on the library");
}
if (!tmpLibFile.setWritable(true, false)) {
throw new Exception("Failed to set writable flag on the library");
}
if (!tmpLibFile.setExecutable(true, false)) {
throw new Exception("Failed to set executable flag on the library");
}
out.close();
in.close();
}
示例10: copyResource
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
private static void copyResource(CordovaResourceApi.OpenForReadResult input, OutputStream outputStream) throws IOException {
try {
InputStream inputStream = input.inputStream;
if (inputStream instanceof FileInputStream && outputStream instanceof FileOutputStream) {
FileChannel inChannel = ((FileInputStream)input.inputStream).getChannel();
FileChannel outChannel = ((FileOutputStream)outputStream).getChannel();
long offset = 0;
long length = input.length;
if (input.assetFd != null) {
offset = input.assetFd.getStartOffset();
}
// transferFrom()'s 2nd arg is a relative position. Need to set the absolute
// position first.
inChannel.position(offset);
outChannel.transferFrom(inChannel, 0, length);
} else {
final int BUFFER_SIZE = 8192;
byte[] buffer = new byte[BUFFER_SIZE];
for (;;) {
int bytesRead = inputStream.read(buffer, 0, BUFFER_SIZE);
if (bytesRead <= 0) {
break;
}
outputStream.write(buffer, 0, bytesRead);
}
}
} finally {
input.inputStream.close();
if (outputStream != null) {
outputStream.close();
}
}
}
示例11: migrateFile
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
private static void migrateFile(File from, File to) {
try {
if (from.exists()) {
FileChannel source = new FileInputStream(from).getChannel();
FileChannel destination = new FileOutputStream(to).getChannel();
destination.transferFrom(source, 0, source.size());
source.close();
destination.close();
}
} catch (IOException ioe) {
Log.w("EncryptedBackupExporter", ioe);
}
}
示例12: writeMetadataSameSize
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
/**
* Replace the ilst metadata
* <p/>
* Because it is the same size as the original data nothing else has to be modified
*
* @param rawIlstData
* @param oldIlstSize
* @param startIstWithinFile
* @param fileReadChannel
* @param fileWriteChannel
* @throws CannotWriteException
* @throws IOException
*/
private void writeMetadataSameSize(ByteBuffer rawIlstData,
long oldIlstSize,
long startIstWithinFile,
FileChannel fileReadChannel,
FileChannel fileWriteChannel,
Mp4BoxHeader tagsHeader) throws CannotWriteException, IOException {
fileReadChannel.position(0);
fileWriteChannel.transferFrom(fileReadChannel, 0, startIstWithinFile);
fileWriteChannel.position(startIstWithinFile);
fileWriteChannel.write(rawIlstData);
fileReadChannel.position(startIstWithinFile + oldIlstSize);
writeDataAfterIlst(fileReadChannel, fileWriteChannel, tagsHeader);
}
示例13: writeNeroData
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
/**
* If the existing files contains a tags atom and chp1 atom underneath the meta atom that means the file was
* encoded by Nero. Applications such as foobar read this non-standard tag before the more usual data within
* ilst causing problems. So the solution is to convert the tags atom and its children into a free atom whilst
* leaving the chp1 atom alone.
*
* @param fileReadChannel
* @param fileWriteChannel
* @param tagsHeader
* @throws IOException
*/
private void writeNeroData(FileChannel fileReadChannel, FileChannel fileWriteChannel, Mp4BoxHeader tagsHeader)
throws IOException, CannotWriteException {
//Write from after ilst upto tags atom
long writeBetweenIlstAndTags = tagsHeader.getFilePos() - fileReadChannel.position();
fileWriteChannel.transferFrom(fileReadChannel, fileWriteChannel.position(), writeBetweenIlstAndTags);
fileWriteChannel.position(fileWriteChannel.position() + writeBetweenIlstAndTags);
//Replace tags atom (and children) by a free atom
convertandWriteTagsAtomToFreeAtom(fileWriteChannel, tagsHeader);
//Write after tags atom
fileReadChannel.position(tagsHeader.getFilePos() + tagsHeader.getLength());
writeDataInChunks(fileReadChannel, fileWriteChannel);
}
示例14: writeFromEndOfIlstToNeroTagsAndMakeNeroFree
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
/**
* If any data between existing {@code ilst} atom and {@code tags} atom write it to new file, then convert
* {@code tags} atom to a {@code free} atom.
*
* @param endOfMoov
* @param fileReadChannel
* @param fileWriteChannel
* @param neroTagsHeader
* @throws IOException
*/
private void writeFromEndOfIlstToNeroTagsAndMakeNeroFree(long endOfMoov, FileChannel fileReadChannel, FileChannel fileWriteChannel, Mp4BoxHeader neroTagsHeader)
throws IOException
{
//Write from after ilst upto tags atom
long writeBetweenIlstAndTags = neroTagsHeader.getFilePos() - fileReadChannel.position();
fileWriteChannel.transferFrom(fileReadChannel, fileWriteChannel.position(), writeBetweenIlstAndTags);
fileWriteChannel.position(fileWriteChannel.position() + writeBetweenIlstAndTags);
convertandWriteTagsAtomToFreeAtom(fileWriteChannel, neroTagsHeader);
//Write after tags atom upto end of moov
fileReadChannel.position(neroTagsHeader.getFileEndPos());
long extraData = endOfMoov - fileReadChannel.position();
fileWriteChannel.transferFrom(fileReadChannel, fileWriteChannel.position(), extraData);
}
示例15: testReadableByteChannel
import java.nio.channels.FileChannel; //导入方法依赖的package包/类
@Test
public void testReadableByteChannel() throws Exception {
int[] testSizes = { 0, 10, 1023, 1024, 1025, 2047, 2048, 2049 };
for (int size : testSizes) {
SelectorProvider sp = SelectorProvider.provider();
Pipe p = sp.openPipe();
Pipe.SinkChannel sink = p.sink();
Pipe.SourceChannel source = p.source();
sink.configureBlocking(false);
ByteBuffer outgoingdata = ByteBuffer.allocateDirect(size + 10);
byte[] someBytes = new byte[size + 10];
generator.nextBytes(someBytes);
outgoingdata.put(someBytes);
outgoingdata.flip();
int totalWritten = 0;
while (totalWritten < size + 10) {
int written = sink.write(outgoingdata);
if (written < 0)
throw new Exception("Write failed");
totalWritten += written;
}
File f = File.createTempFile("blah"+size, null);
f.deleteOnExit();
RandomAccessFile raf = new RandomAccessFile(f, "rw");
FileChannel fc = raf.getChannel();
long oldPosition = fc.position();
long bytesWritten = fc.transferFrom(source, 0, size);
fc.force(true);
if (bytesWritten != size)
throw new RuntimeException("Transfer failed");
if (fc.position() != oldPosition)
throw new RuntimeException("Position changed");
if (fc.size() != size)
throw new RuntimeException("Unexpected sink size "+ fc.size());
fc.close();
sink.close();
source.close();
f.delete();
}
}